Accurate laboratory ultraviolet wavelengths for quasar absorption-line constraints on varying fundamental constants

@article{Aldenius2006AccurateLU,
  title={Accurate laboratory ultraviolet wavelengths for quasar absorption-line constraints on varying fundamental constants},
  author={Maria Aldenius and Se. Johansson and McDonald Observatory and Ioa and Cambridge},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2006},
  volume={370},
  pages={444-452}
}
The most precise method of investigating possible space-time variations of the fine-structure constant, alpha equivalent to (1/hc)(e(2)/4 pi epsilon(0)), using high-redshift quasar absorption lines is the many-multiplet (MM) method. For reliable results this method requires very accurate relative laboratory wavelengths for a number of UV resonance transitions from several different ionic species. For this purpose laboratory wavelengths and wavenumbers of 23 UV lines from Mg I, Mg II, Ti II, Cr… 

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References

SHOWING 1-10 OF 41 REFERENCES
Accurate laboratory wavelengths of some ultraviolet lines of Cr, Zn and Ni relevant to time variations of the fine structure constant
The quality of astronomical spectroscopic data now available is so high that interpretation and analysis are often limited by the uncertainties of the laboratory data base. In particular, the limit
Precise laboratory wavelengths of the Mg I and Mg II resonance transitions at 2853, 2803 and 2796 Å
Strong ultraviolet resonance transitions are observed routinely both in the Galactic interstellar medium and in quasar absorption systems. The quality of the astronomical spectroscopic data now
Possible evidence for a variable fine structure constant from QSO absorption lines: Motivations, analysis and results
An experimental search for variation in the fundamental coupling constants is strongly motivated by modern high-energy physics theories. Comparison of quasar absorption line spectra with laboratory
Calculations of the relativistic effects in many-electron atoms and space-time variation of fundamental constants
Theories unifying gravity and other interactions suggest the possibility of spa- tial and temporal variation of physical "constants" in the Universe. Detection of high-redshift absorption systems
VLT/UVES constraints on the cosmological variability of the fine-structure constant
We propose a new methodology for probing the cosmological variability of α from pairs of Fe  lines (SIDAM, single ion differential α measurement) observed in individual exposures from a high
Probing the variability of the fine-structure constant with the VLT/UVES
We assess the cosmological variability of the fine-structure constant from the analysis of an ensemble of Fe II absorption lines at the redshift z=1.15 toward the QSO HE 0515-4414 by means of the
Limits on the time variation of the electromagnetic fine-structure constant in the low energy limit from absorption lines in the spectra of distant quasars.
TLDR
A detailed many-multiplet analysis performed on a new sample of Mg ii systems observed in high quality quasar spectra obtained using the Very Large Telescope finds that it is the time variation of alpha that forms the strongest constraint obtained based on high redshift quasar absorption line systems.
Probing the cosmological variation of the fine - structure constant: Results based on VLT - UVES sample
Development of fundamental physics relies on the constancy of various fundamental quantities such as the fine- structure constant. Detecting or constraining the possible time variations of these
Variation of the fine-structure constant: very high resolution spectrum of QSO HE 0515-4414
Aims, We present a detailed analysis of a very high resolution (R ≈ 112 000) spectrum of the quasar HE 0515-4414 obtained using the High Accuracy Radial velocity Planet Searcher (HARPS) mounted on
Constraining variations in the fine-structure constant, quark masses and the strong interaction
We present evidence for variations in the fine-structure constant from Keck/HIRES spectra of 143 quasar absorption systems over the redshift range 0.2 1.8). Our most robust estimate is a weighted
...
...